Motorcycle Fleet Field Test Study of Two-stroke Catalytic Converters in China

New Chinese national standards on motorcycles and mopeds exhaust emission have been published. Technical feasibility study of use of catalytic converters on Chinese two-stroke motorcycles was conducted by means of mileage tests. 100, 90 and 50 ml motorcycles were included in the test fleet and different converters coated in China were tested. Different factors producing different effects on converter performance were investigated such as exhaust temperature, lubrication oil, and second air injection system.